New PCIE NIC Not Getting Interface Assigned

[Rework1415]

I've installed a PCIE NIC into my machine running Proxmox, but no new interfaces are showing up under the network tab. I can tell that the NIC is detected by the computer because it shows up when I run

lspci | egrep -i --color 'network|ethernet'

, which I've shown in the first screenshot. The NIC in question has the 4 Intel I350 ports.

The second screenshot shows what's in my

/etc/network/interfaces

file.

Is there some step that I'm missing to get the adapters assigned to an interface?

 

[Hqu]

Hey,

what's your output of ip a?
What chipset is your NIC using? Intel?

Best

 

[Rework1415]

The NIC uses Intel I350.

Please see the screenshot for the output of

ip a

In that, enx000ec6ec4728 is a USB ethernet adapter that is working properly already

 

[JensF]

The card should work with the "ixgbe" driver.
Try

modprobe ixgbe

and then have a look with

ip a

again.

 

[Rework1415]

Unfortunately that doesn't seem to have made any difference. Pictures are of running the two commands you asked, as well as part of the relevant output of lspci -v

 

[JensF]

Any errors?

dmesg | egrep -i --color 'igb'

 

[Rework1415]

The card is shown, but I'm not sure if these are errors or just acknowledgments

 

[JensF]

Edited my post because it is using the "igb" driver and that's fine.
You can unload the driver again with

rmmod ixgbe

 

[JensF]

Got it! You're using PCI(e) Passthrough...
https://pve.proxmox.com/wiki/PCI(e)_Passthrough

 

[Rework1415]

So yes, I do have PCIe Passthrough enabled for an NVIDIA GPU on another VM. I tried passing through the ethernet NIC as PCIe to this new VM and get the following error

kvm: -device vfio-pci,host=0000:02:00.0,id=hostpci0,bus=pci.0,addr=0x10: vfio 0000:02:00.0: failed to open /dev/vfio/1: Device or resource busy
TASK ERROR: start failed: QEMU exited with code 1

When I did some digging. people were suggesting not to use PCIe Passthrough for NICs, so I started to go down this route. I don't mind either way, I'd just like to get this working

 

[JensF]

You have to revert this settings for the network card and make sure the igb kernel driver is used again. The link I posted above should help.
Next time just tell us the whole story what you did. It's easier for you and for us...

 

[Rework1415]

Is there a way to get this NIC into my VM without disabling PCIe Passthrough? I still need that enabled for the GPU

 

[Rework1415]

Got it working by adding pcie_acs_override=downstream,multifunction within "GRUB_CMDLINE_LINUX_DEFAULT" inside the file /etc/default/grub

I also ran the commands

echo "options vfio_iommu_type1 allow_unsafe_interrupts=1" > /etc/modprobe.d/iommu_unsafe_interrupts.conf

and

echo "options kvm ignore_msrs=1" > /etc/modprobe.d/kvm.conf

After this, the GPU and the NIC show up in different IOMMU groups and can be passed through to the VMs as I need